Aliens could be STRANDED on own planets because gravity is TOO strong ALIENS may not be able to conquer space travel as the gravity on their home planet may be too strong for them to escape from, according to a new theory which could explain why we are yet to meet extraterrestrials. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Eclipse 2018: Supermoon ‘caused deadly 2011 Japan tsunami’Eclipse 2018: Supermoons may spark ‘BIBLICAL year’ with the second coming of ChristEclipse 2018: What time is the Super Blue Blood moon in the US? Full DetailsEclipse 2018: What time is the Super Blue Blood moon in the UK? Full DetailsEclipse 2018: Best places to watch Super Blue Blood Moon on January 31Volkswagen Suspends Top Lobbyist Amid Inquiry Into Diesel Tests on Monkeys